Line marker for roadbeds



Sept. 4, 1928. 1,683,121 7 L. F. N. BALDWIN LINE MARKER FOR ROADBEDS Filed May 1, 1926 A TTORNEYS.

Patented Sept. 4, 1928. I

UNITED STATES v 1,683,121 PATENT OFFICE.

LEON I. N. BALDWIN, OF EDG-EWOOD, RHODE ISLAND, ASIGNOR OF ONE-HALF T0BENJAMIN S. CLARK, 0F PROVIDENCE, RHODE ISLAND.

LINE MARKER FOR ROADIBEDS.

7 Application filed May 1,

This invention relates to an improved line marker for roadbeds, and hasfor its object to provide a marker of this character formed of a seriesof lates which may be set into roadbeds of different constructions suchas asphalt, concrete, macadam, and the like for the purpose of markingsafety zones and directing traflic thereover.

A further object of the invention is to provide this marker with aseries of corrosionresisting plates adapted to be readily connectedtogether end to end and set into the roadbed.

A still further object of the invention is the provision of head andsocket joint memhas on these plates whereby they may be readilyconnected end to end toform a bendable strip to be set in a straightline or bent in a curve in either direction. 7

The invention further consists in the provision of side flanges on theplates preferably set on an outwardly-inclined angle from the plane ofthe plate whereby when the plate is set into the roadbed it isdovetailed or locked therein.

With these and other objectsin view, the invention consists of certainnovel features of construction as will be more fully described, andparticularly pointed out in the appended claims. I

In the accompanying drawings:

Figure 1 is a view illustrating a series of my improved plates connectedtogether end to end and set to form a curve.

Figure 2 is an enlarged face view of one of the plates showing therounded head at one end, and a'socket on the opposite end of the plate.

Flgure 3 is a section on line 33 of Figure 2, illustrating the flangeson the bottom of the plate also illustrating the fastening bolt and thenut as set into the roadbed for assistin in securing the marker plate inposithis character have been accomplished by 1926. Serial No. 106,105.

by reflecting the lights of a vehicle. Then again, by employing thismetal the same is kept bright by abrasion due to tires traveling overthe same; also it is found in practice of advantage to form such amarker of a series of plates and so construct these plates that they maybe flexibly locked together end to end in such a Way that they may becaused to to take a curve in either direction as well as to lie in astraight line; and the following is a detailed description of the resentembodiment of my invention and s owing one construction of line markerfor roadbeds by which these advantageous results may be accomplishedWith reference to the drawings, 10 designates one of the plates of aseries of my 1mproved line marker, the same being elongated and having arounded head shaped extension 11 at one end and a correspondingly-shapedsocket 12 at its opposite end to receive the head of the next ad acentplate,.the end portions of the plates being cut away on anangle topermit the plates being set out of alignment with each other to follow abend in the road when desired. c

The face 13 of the plate is preferably slightly oval, as shown in Figure3, the same being provided with holes 14, through which lockmg bolts 15may extend preferably into an expanding nut 16 which may be set into theroadbed 17 In some instances, I form side flanges or ribs 18 along theopposite side of this plate and referably set these flanges on adownward ly and outwardly extending angle from the plane of the plate,whereby when set into the roadbed, they are dovetailed therein and serveto securely lock the plate in the road bed.

In other instances, I provide intermediate lon 'tudinal strengtheninribs 19 and again provide bosses 20 t rough which the bolts 15 extend.

In order to prevent horses from slipping 'imbedding theangularly-dispose the adjacent plateby means of which these two platesare securel locked together end to end at, the same time are permittedto bend around a curve; also when the plates are set in position in theroadbed the surface 22 of the bed is brought substantially flush withthe edge 23 of the (plates thus flanges 18 therein to securely lock theplate in position in the roadbed.

My improved line marker is very simple and practical in construction,inexpensive to produce and is very efiective in its 0 ration and may bereadily set into a roa d in either a straight line or to conform to andesired curve. v

e foregoing description is directed soletowards the constructionillustrated, but

l desire it to be understood that I reserve the privilege of resortingto all the mechanical changes to.which the device is' susce tible, theinvention being defined and limited only by the terms of the appendedclaims.

I claim:

1. A line marlrer for a roadbed compris- 3" ing a series of plates, eachplate having a rounded head atone end and provided with a' circularsocket at its other end to receive and retain the head of the nextadjacent plate by which said plates are flexibly connected end to end.

8. A line marker for a roadbed comprising aseries of plates, each platehaving a rounded head at one end and provided with a circular socket atits other end to receive and retain the head of the next adjacent plateby which said plates are flexibly connected end to end, and means forlocking said lates to the roadbed comprising a rearwar y extendingflange along the opposite edges "of the plates set on an incline to thelaneof the plate whereby it is dovetailed mto the roadbed.

In testimony whereof I aflix m signature.

LEON F. N. B DWIN.

